string.spec.js
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import {
escapeRegExp,
kebabCase,
lowerFirst,
pascalCase,
startCase,
toString,
upperFirst
} from './string'
describe('utils/string', () => {
it('kebabCase() works', async () => {
expect(kebabCase('foo')).toBe('foo')
expect(kebabCase('Foo')).toBe('foo')
expect(kebabCase('fooBar')).toBe('foo-bar')
expect(kebabCase('FooBar')).toBe('foo-bar')
expect(kebabCase('XFooBar')).toBe('x-foo-bar')
})
it('pascalCase() works', async () => {
expect(pascalCase('foo')).toBe('Foo')
expect(pascalCase('Foo')).toBe('Foo')
expect(pascalCase('fooBar')).toBe('FooBar')
expect(pascalCase('FooBar')).toBe('FooBar')
expect(pascalCase('foo-bar')).toBe('FooBar')
expect(pascalCase('x-foo-bar')).toBe('XFooBar')
expect(pascalCase('xFooBar')).toBe('XFooBar')
})
it('startCase() works', async () => {
expect(startCase('foobar')).toBe('Foobar')
expect(startCase('Foobar')).toBe('Foobar')
expect(startCase('foo_bar')).toBe('Foo Bar')
expect(startCase('foo bar')).toBe('Foo Bar')
expect(startCase('fooBar')).toBe('Foo Bar')
})
it('lowerFirst() works', async () => {
expect(lowerFirst('Upper')).toBe('upper')
expect(lowerFirst(' Upper ')).toBe('upper')
expect(lowerFirst('Upper case')).toBe('upper case')
expect(lowerFirst(null)).toBe('null')
expect(lowerFirst(undefined)).toBe('undefined')
expect(lowerFirst({})).toBe('[object Object]')
expect(lowerFirst([])).toBe('')
expect(lowerFirst(['Foo', 'bar'])).toBe('foo,bar')
})
it('upperFirst() works', async () => {
expect(upperFirst('lower')).toBe('Lower')
expect(upperFirst(' lower ')).toBe('Lower')
expect(upperFirst('lower case')).toBe('Lower case')
expect(upperFirst(null)).toBe('Null')
expect(upperFirst(undefined)).toBe('Undefined')
expect(upperFirst({})).toBe('[object Object]')
expect(upperFirst([])).toBe('')
expect(upperFirst(['foo', 'bar'])).toBe('Foo,bar')
})
it('escapeRegExp() works', async () => {
expect(escapeRegExp('Hello?')).toBe('Hello\\?')
expect(escapeRegExp('$100')).toBe('\\$100')
expect(escapeRegExp('10 * 5')).toBe('10 \\* 5')
expect(escapeRegExp('[-/\\^$*+?.()|[\\]{}]')).toBe(
'\\[\\-\\/\\\\\\^\\$\\*\\+\\?\\.\\(\\)\\|\\[\\\\\\]\\{\\}\\]'
)
})
it('toString() works', async () => {
expect(toString(null)).toBe('')
expect(toString(undefined)).toBe('')
expect(toString(true)).toBe('true')
expect(toString(false)).toBe('false')
expect(toString({ a: 1, b: 2, c: { d: 'foo' } })).toBe(`{
"a": 1,
"b": 2,
"c": {
"d": "foo"
}
}`)
expect(toString({ a: 1, b: 2, c: { d: 'foo' } }, 4)).toBe(`{
"a": 1,
"b": 2,
"c": {
"d": "foo"
}
}`)
expect(toString([])).toBe('[]')
expect(toString(['foo', 'bar'])).toBe(`[
"foo",
"bar"
]`)
})
})